Tonian - Wikipedia
The Tonian (from Ancient Greek: τόνος, romanized: tónos, meaning "stretch") is the first geologic period of the Neoproterozoic Era. It lasted from 1000 to 720 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined by …
Tonian Period | Glaciation & Facts | Britannica
Tonian Period, earliest of the three periods of the Neoproterozoic Era, extending from 1 billion to approximately 720 million years ago. It immediately followed the Stenian Period of the Mesoproterozoic Era (which lasted from 1.2 billion to 1 billion years ago) and was succeeded by the Cryogenian Period (approximately 720 million to ...
Neoproterozoic - Wikipedia
It is preceded by the Mesoproterozoic era and succeeded by the Paleozoic era of the Phanerozoic eon, and is further subdivided into three periods, the Tonian, Cryogenian and Ediacaran.
Cryogenian - Wikipedia
The Cryogenian (from Ancient Greek: κρύος, romanized: krýos, meaning "cold" and γένεσις, romanized: génesis, meaning "birth") is a geologic period that lasted from 720 to 635 million years ago. [6] . It is the second of the three periods of the Neoproterozoic era, preceded by the Tonian and followed by the Ediacaran.
Tonian - Simple English Wikipedia, the free encyclopedia
The Tonian was the first geological period in the Neoproterozoic era. It lasted from 1000 million years ago (mya) to 720 mya. The supercontinent Rodinia began breaking in this period. Acritarchs radiated during the Tonian.
Tonian Transitions in Earth's Marine Biosphere - Astrobiology
2025年1月17日 · The Tonian Period is the earliest of the Neoproterozoic Era and lasted from approximately 1 billion to 720 million years ago. The Tonian occurred between the Stenian Period of the Mesoproterozoic Era, and the Cryogenian Period of the Neoproterozoic Era.
After the Boring Billion and Before the Freezing Millions
2018年8月30日 · A recent study provides new details about the evolution of life on Earth during the Tonian Period, which spanned from 1000 to 720 million years ago. The Tonian occurred after a roughly one billion year stretch of time when the environment, life, and lithology of Earth was relatively stable.
The Tonian and Cryogenian Periods - ScienceDirect
2020年1月1日 · The Tonian and Cryogenian periods together span from 1000 to c. 635.5 Ma and are currently chronometrically divided at 720 Ma. The early Tonian followed the amalgamation of the Rodinia supercontinent and is a time for which the stratigraphic, chemostratigraphic, and fossil record is relatively sparse and poorly dated.
Neoproterozoic Era - Science Facts
Neoproterozoic era is divided into 3 major periods, the Tonian Period, Cryogenian Period, and the Ediacaran Period. This era is marked by different significant developments in the Earth’s biota, geology, and climate.
Plant Evolution & Paleobotany - Tonian - Google Sites
The Tonian is the first period of the Neoproterozoic, occuring after the Stenian (Mesoproterozoic Era) and before the Cryogenian Period. What happens during this time? Above: Palaeolyngbya, a...